drm/amd/powerplay: disable uclk dpm by default

[why]
The uclk dpm feature is not supported by some certain navi10
board like 18202, while supported by some board like 18201.
It causes modprobe failure on 18202 board.

[how]
Disabled this feature by default, it can be enabled by module parameter
uclk_dpm_support=1.
Reviewed-by: Jack Xiao <Jack.Xiao@amd.com>
Signed-off-by: tiancyin <tianci.yin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/navi10_ppt.c

@@ -273,8 +273,10 @@ navi10_get_allowed_feature_mask(struct smu_context *smu,
 				| FEATURE_MASK(FEATURE_LED_DISPLAY_BIT)
 				| FEATURE_MASK(FEATURE_MMHUB_PG_BIT)
 				| FEATURE_MASK(FEATURE_ATHUB_PG_BIT)
-				| FEATURE_MASK(FEATURE_DPM_DCEFCLK_BIT)
-				| FEATURE_MASK(FEATURE_DPM_UCLK_BIT)
+				| FEATURE_MASK(FEATURE_DPM_DCEFCLK_BIT);
+
+	if (adev->pm.pp_feature & PP_MCLK_DPM_MASK)
+		*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_DPM_UCLK_BIT)
 				| FEATURE_MASK(FEATURE_MEM_VDDCI_SCALING_BIT)
 				| FEATURE_MASK(FEATURE_MEM_MVDD_SCALING_BIT);